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Solution - Quadratic equations

x=(-30-sqrt(20))/10=-3-1/5sqrt(5)=-3.447
x=(-30-sqrt(20))/10=-3-1/5sqrt(5)=-3.447
x=(-30+sqrt(20))/10=-3+1/5sqrt(5)=-2.553
x=(-30+sqrt(20))/10=-3+1/5sqrt(5)=-2.553

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